Paul sagbebg and eelif mikdeltholt



P. SAGBERG AND- L'. MIDDELTHON.

MEANS FOR PREVENTING RACING IN JET TURBINES. APPLICATION FILED use. 4.1917.

,307, 703. Patented June 24, 1919.

PAUL SAGBE'BG AND nnrr MIDDELTHON, orcnnisriania, noawav;

MEANS FOR PREVENTING- RACING IN JET-TURBINES.

Specification of Letterslatent. i June 24,

Application filed December 4, 1917. Serial No. 205,409.

To all whom it may concern:

Be it known that we, PAUL Saennue and Len MmnELTHoN, both subjects ofthe King of Norway, and residing at Christiania, in the Kingdom ofNorway, have invented certain new and useful Improvements in the Meansfor Preventing Racing in Jet-Turbines; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters or figures of reference marked thereon, which form a partof this specification.

The present invention relates to turbines of the jet type and has forits object a means for automatically preventing the racing of this kindof turbines.

It is well known that even with the best possible governors such racingmay take place it an accident happens and as the racing of a turbinewill always expose the parts of the same. to a dangerous strain, it is amatter of considerable importance to find a sure and automatical way ofpreventing such racing.

This according to the present invention is obtained in the followingmanner.

Then the speed of the water-wheel increases, the direction of the waterleaving the buckets gradually changes, so that in stead of fallingstraight down it follows more or less the direction of the jet.

This fact is utilized in accordance with the present invention byplacing a screen or the like inside the wheel-house in such a mannerthat the water caught up by said screen is used to counteract the efiectof the water directed toward the waterwheel buckets from the mouthpiece.y

This may be done either by conducting the water back toward thewaterwheel buckets or toward the jet itself deflecting the same whollyor partly.

In the accompanying drawings: Figure 1 is an elevatlon partly in sectionillustrating one form of the invention in connection with a water-wheelof the Pelton toward the buckets 3.

When the waterwheel runs with its normal number of revolutions thedirection of the water leaving the bucket-s is as indicated by the arrow5. If the wheel goes slower th water leaves the buckets in the directionindicated by arrow 6 and it it goes faster the water leaving the bucketsis directed as indicated by arrow 7 or when still faster as arrow 8.

In the latter case it will be seen that the water is taken up by astationary bucket or screen 9 by meansot which it is directed back asindicated by the arrow 10 against the waterwheel buckets, thuscounteracting the effect of the water jet 4.

It will be understood that the illustration is merely diagrammatical andin most cases the screens or buckets 9 will have to be placed on eachside of the waterwheel as the water leaving the usual double buckets ispartly directed sidewise.

Also it will be understood that the screen or bucket may be given anyother form in order to conduct the water toward another point for thesame purpose, such as for instance against the jet 4 in order to deflectthe same.

Although the method is above described in connection with Peltonwaterwheels it is obvious that it may also be utilized in other turbinesystems such as steam turbines or the like.

The screen or bucket may be arranged in an adjustable manner so that itsposition may be adjusted by hand in a vertical plane by means of bolts11 and in a horizontal plane by bolts 12, but it may also form astationary part integral With the turbine house.

In a Water turbine, the combination with a rotary vane member, and anozzle for rojecting a, jet of Water onto said vanes; of an adjustabledeflecting member extending into the path of the jet and adapted toreverse the direction of flow of the latter onto said vanes after thewater has passed the vanes, thereby counteracting the effect of the jeton the vanes.

In testimony that We claim the foregoing as our invention, We havesigned our names in presence of tWo subscribing Witnesses.

PAUL SAGBERG. LEIF MIDDELTHON.

Witnesses:

C. FABRICIUS HANSEN, C. VARMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G.

